Arc-lamp.



J. H. WAGENHORST.

ARC LAMP.

APPLICATION FILED DEC. 24, 1912.

- 1,279,618. Patented Sept. 24, 1918.

3 SHEETS-SHEET I.

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J. H. WAGENHOR'ST. ARC LAMP. APPLICATION FILED DEC. 24. r912.

Patented Sept. 24,1918

3 SHEETS-SHEET 2.

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ARC LAMP.

I APPLICATION FILED DEC.24, I912. 1,279,618.

Patented Sept. 24, 1918.

3 SHEETSSHEET 3.

JAMES H. wAGENHonsT, or AKRON, 01110.

ABC-LAMP.

Specification of Letters Patent.

Patented Sept. 24, 19182 Application filed December M, 1912. Serial No. 738,506.

, To all whom it may concern:

Be it known that 1, JAMES H. WAGEN- HORST, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented a new and useful Improvement in Arc-Lamps, of which the following is a specification.

:This invention relates generally to are lamps, and more particularly to-an arc lamp adapted for use in connection with electric blue printing machines, butit will of course i be understood that the lamp as constructed and operated can be used for general lighting purposes equally as well as for electric light blue printing.

The object of my present invention is to simplify the number of parts and also their construction; to cut down the heavy starting current by the elimination of one of the coils or solenoids and replacing it with a spring mechanism which will carry approximately one-half of theload imposed by the carbon,

line 7'( of Fig. d.v

carbon holder, dash pot and solenoid, this spring mechanism to carry its load through the clutch to assist it in holding the carbon in operative position in either direction.

With this object in view, and with certain other objects as will hereinafter appear the invention consists in the novel features of construction together with novelties of arrangement or combination all of which will be hereinafter fully described and pointed out in the claims. 1

In the drawings forming a part of this specification V Figure 1 is anelevation with parts in section of an electric arc lamp constructed in accordance with myinvention.

Fig. 2 is an elevation with parts in section taken from a point at right angles 'to the view point of Fig. 1.

Fig. 3 is a view similar to Fig. 1, but taken from the opposite side.

Fig. 4 is a sectional elevation illustrating the solenoid, dash pot and clutch.

Fig. P is a detail sectional. view of the dash pot.

Fig. 5'is a sectlonalplan view on the line 55 of Fig. 4. Q Fig. 6 is. a sectional view taken on the line 6-6 of Fig. 4.

Fig. 7 is a detail sectional view on the Fig. 8 is a d tail perspective view of the upper carbon holder which is adapted to "work in the upper carbon guide.

p said bracket arms 'jiThe upper carbon Fig. 9 is a detail sectional view on the l1ne 9-9 of Fig. 3. i

Fig. 10 is a vertical sectional view of the lower carbon holder and illustrating the manner of securing the same.

Fig. 11 is a view illustrating the manner of winding the solenoid;

In the practical embodimefit of my invention I employ a circular skeleton plate or frame A, to which the binding posts for the conductor wires are attached, and which also carries the lamp suspending means A. To the under side of this skeleton plate or frame is attached the upper end of the upper carbon guide B, this carbon guide B, being in the form of a tube which is divided lon%'- tudinally as shown at B, the upper ends 2 being spread apart as shown and secured to the under side of the top frame or plate A,

by the same bolts which secure the binding posts and it will also be noted that the conductor wires leading 'to the solenoid and lower carbon are connected to the binding posts upon the interior of the skeleton frame 8 or plate A, as most clearly shownin Fig.2,

tween the divided ends of the upper carbon guide and the skeleton frame or plate. The

- a strip of insulation B" being interposed belower end of the carbon guide B, isdivided 5 and spread as shown at B, the lower ends thereof being rigidly secured to a circular asbestos plate C, which serves the double purpose of'providing points of attachment. for the carbon holder,

shield them from the heat generated by the lamp, and thereby prevents this heat belng transmitted to the working parts of the dedash pot and lamp ,brackets, and at the same time serves to" vice; -Globe carrying brackets D, are rig- 5 idly secured to the circular asbestos plate C,

D being connected at their lower ends to a casting E which serves as a guide for the lower carbon holder F as more fully explained hereinafter One of the depending bracket arm D, is

preferably flattened out or made verythin as shown in Fig. 2, in. order to cast a very small or narrow shadow, and if preferred both of these brackets can be so constructed. 195

G, is fitted at its upper end to a sleeve G, from which extends connecting post G to which the wire G is connected, said wire G leading from the solenoid H, hereinafter described in detail.

The upper carbon G works through a clutch I, and is lifted by this clutch. This clutch I is pivoted at I to the lower end of a depending rod P, which is connected at its upper end to the dash pot K, said dash pot being inverted as shown and workmg upon piston K, supported by the rod K secured to the upper end of the bracket K which is attached to a circular insulating plate C. The dash pot K is connected to the core H of the solenoid through the me dium of a coil spring H this spring providing a yielding connection between these parts which overcomes any quick or jerking movement. It will of course be understood that when the core of the solenoid is drawn up the dash. pot will be carried with it which in turn-raises the clutch and quently the upper carbon.

Heretofore two solenoids. have been usually employed for the purpose of carrying out the various operations of the arc lamp and one of the principal objects-of my invention is to do away with one of the solenoids, and aid thesingle solenoid by a spring which will carry approximately onehalf of the load imposed by the carbon, carbon holdeijdash pot and solenoid, said spring carrying this load through the clutch to assist it in holding the carbon in operative position in either direction.

This coil spring L, shown most clearly.

in Figs. 2 and 3 is connected to the top plate or frame A by means of a screw L, and by means of which the spring as a whole can be raised or lowered to accommodate voltage changes in various sections, as it is necessary to make the lamp adjustable to the current conditions, and as one means of accomplishing this I provide for the adjustment of this spring L, which constitutes one of the most important featuresof this lamp construction. The lower end of this spring L is connected to a Y-shaped lever M, the short leg M of said lever being attached to the upper carbon guide by means of a rod M while the longer and diverging legs M which straddle the dash pot K, are connected by rods M to the short arm of the clutch I and as such connection is on the opposite side of the fulcrum of the clutch from the carbon the clutch will be shifted or turned on its pivotal point through its connection with the lever M as it is moved upwardly and downwardly by the dash pot, said movement being against the tension of the spring L on downward movement of the clutch and aided by such spring on the upward movement of the dash pot. From the above description it will be understood that inasmuch as the short arm of the Y-shaped lever M is fixed, it is obvious that when the dash pot carrying the clutch moves downwardly the pull exerted upon the long diverging legs of the lamp M causes a downward pull upon the springL and spring L being therefore put under ten sion, will materially assist in the lifting movement of the carbon, clutch, dash pot and connected parts through the medium of the lever M; and the spring L, lever M and connecting rods are of such size and so arranged. with relation to each other .that practically one-half of the load is carried by the spring, and consequently I am able to successfully carry out all of the functions of the arc lamp with the use of a single solenoid and thereby simplify the working parts, reducetheir number, and cut down the heavy starting current.

The solenoid I is held in a bracket H made of sheet etal and attached to the upper carbon guide B and this solenoid consists of a spool H around which the insulated wire H is wound in a peculiar manner as hereafter explained, and withinthe spool 'H is a sleeve H", the ends of which are turned over to connect the solenoid to the supporting bracket or carrier H The core is preferably of laminated constructionas shown at Fig. 2,but the solid form can be employed if so desired.

In winding the solenoid I employ a different method from that ordinarlly employed, the usual mcthodbeing to employ insulating disks at the ends, in order to properly insulate the coils inasmuch as the wire leading to the 'spool was carried entirely to the ,center thereof. In my construction I employ a stepped and tapered spool illustrated in Fig. 11, and around which the wire H is wound and after the winding operation has been completed this stepped and tapered spool is withdrawn and the wires flattened downintothe positions indicated in Fig. 4, and after being so flattened down the topof the spool is fastened thereon by means of the turned over sleeve previously described. The solenoid is connected with one of the binding postsas most clearly shown, the opposite end of the solenoid being connected with the upper carbon i by the wire G The wire G leading from the other binding post is divided as shown, one portion being connected by means of binding screws to one of the globe brackets D, while the other portion is connected by means of suitable binding connections to the other globe bracket D. The lower car- This lower holder F is formed 12 p angled as shown at E to engage the lower with the lower and reduced end of the car-- .bonholder as most clearly shown in Figs. 1, 2 and 10.

The carbon holder F is formed at its upper end with a beveled shoulder F on which rests the flanged collar F? the inner edge thereof being undercut to fit the beveled shoulder F The globe F rests upon this flanged collar F, the upper end of said globe being held against a casting F having a flange F and a depending concave portion F this casting being of such shape as to fit the upper end of the globe to hold the same in place and also serve somewhat as a reflector. It will of coursebe understood that this casting D1 which in reality is the upper globe holder, is attached to the under side of the circular insulating plate C. The lower .carbon being held in definite position with relation to the globe brackets always maintains the lower carbon in proper alinement-with the upper one and is independent of any movement of the globe, and consequently the globe, can be slightly tilted or shifted without disturbing the proper allnement of the carbons, which is not the case with lamps in general use in which the globe holder or lower carbon holder are so connected that any movement on the part of the globe effects the position of the lower carbon. When it is desired to remove the lower carbon and replace the'same it is only necessary to pull back the spring E take out the carbon holder, remove the short piece of carbon and insert a new one. The upper. carbon can of course be replenished easily by unscrewing the thumb nut, withdrawlng the consumed piece of'carbon and substituting another one.

- In addition to the other special features of construction I propose to make the dash pot of novel construction also. This dash pot K is inverted or arranged with its open end downward. The piston K is a solid piece of carbon according to standard practice, in the center of-which is a sleeve provided with a cross pin to which the supporting rod is attached. In the upper end of the dash pot is produced a small opening K, this opening is surrounded upon the top of the dash pot by means of a tubular extension K to which the lower end of the 0011 spring H is connected as most clearly shown'in Fig. P. Within the tubular extension and covering the opening K is a th1n disk K of non-magnetm material and in practice I prefer to make this disk of a di-ameter somewhat less than the interior diameter of the tubular extension and also provide an annular groove or recess K be with the solenoid brings about this desired operation.

Heretofore it has been usual to employ a ball valve of non-magnetic material in connection with the dash pot port but the weight of this ball will cause a total weight upon the port of approximately one-half pound or mother words it would require more than one-half pound difference in load to effect any change in the position of the dash pot and would therefore retard the downward action of the upper carbon due to a reduction in the current and the corresponding reduction in the pulling power of the magnet with the result that the lamp would go out or at least cause it to chatter, both of which are to be avoided if possible and which will be avoided by the mechanisms herein shown and described.

Owing to the peculiar manner of supporting the lever M the leverage "varies as the dash pot moves up and down owing to the shifting of the pivot pins of the lever and by this arrangement the proper correlation or compensation between the solenoid and spring is obtained.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. An arc lamp comprising a frame, an electrode, a clutch for lifting said electrode, spring means connected at one end to a stationary part of said frame and pivotally connected at the other to said clutch and acting in a direction so as to tend to lift said clutch, and electromagnetic means for lifting said clutch pivotally connected to the latter between the electrode and the pivotal connection of the spring means.

2. An arc lamp comprising a frame, an electrode, a clutch for lifting said electrode, spring means connected at one end to a stationary part of said frame and pivotally connected at the other to said clutch and acting in a direction so as to tend to lift said "clutch, and an electromagnetic/means for lifting said clutch pivotally connected to the latter between the electrode and the pivotal connection of the spring means and adjacent to said connection. I

3. An arc lamp comprising a frame, an electrode, a clutch for lifting said elect-rode, spring means pivotally connected to said clutch and acting in a direction so as to tend to lift said clutch, and electromagnetic means for lifting saidclutch pivotally connected to the latter between the electrode and the pivotal connection of the spring means, and adjacent to said point of connection.

4. An arc lamp comprising a frame, an electrode, a clutch for lifting said electrode, spring means pivotally connected to said clutch and acting in a direction so as to tend to lift said clutch, electromagnetic. means for lifting said clutch pivotally connected to the latter between the electrode. and the- 6. In an arc lamp, the combination with a carbon clutch, of a solenoid, a spring sup ported lever fixed at one end and connected at its opposite end with the end of said clutch, connecting means between the solenoid and clutch, said connecting means being connected to the clutch between the electrode and the pivotal connection with the spring supported lever. v

In an arc lamp, the combination with a solenoid and its core, of a dash pot connected with said core and having a depending portion, a carbon clutch, a lever fixed at one end, a spring supportfor said lever, a link connecting the free end of said lever with the end of carbon clutch, the depending portion of said dash pot being pivotallyconnected to the carbon'clutch between the electrode carrying end and the link connection.

8. In an arc lamp, the combination with a solenoid and its core, of a dash pot conbeing pivotally nected with said core, a fixed piston uponwhich said dash pot works, a carbon clutch, a spring supported lever having pivotal connection with the end of the clutch, said dash pot having a dependin portion pivotally connected to the clutch etween the ends of clutch and adjacent to the pivotal connection with the lever.

9. In an arc lamp, the combination with a solenoid, of a dash pot connected with the core thereof and operated thereby upon a fixed piston, a carbon clutch, a spring, a lever pivoted at one end and bifurcated to straddle the dash pot, the bifurcated end connected with the end of said clutch, said dash pot having a portion pivotally connected to the clutch between its pivoted end and its electrode carrying end.

10. In an arc lamp, the combination with a carbon guide, of a solenoid carried thereby, a dash pot connected with the core of said solenoid and movable thereby upon a fixed piston, a carbon clutch, a spring support, a lever connected thereto, one end of -said lever being pivotally connected to the carbon uide and the opposite end of said lever belng pivotally connected to the carbon clutch and means connecting the dash pot with the carbon clutch between its pivotal end and its carbon carrying end.

11. In an arclamp, the combination with a carbon guide, of a solenoid carried thereby, a dash pot yieldingly connected with saidsolenoid and movable thereby upon a fixed piston, a carbon clutch, an adjustable spring support, a lever connected thereto, one end of said lever being pivotally connected to the carbon guide, the opposite end of said lever being pivotally connected to the carbon clutch, and a depending member carried by the dash pot and pivotally connected to the carbon clutch between its pivoted end and its carbon carrying end.

JAMES H. WAGENHORST.

Witnesses: I

CHAS. E. BROOK, E. B. MCBATH. 

